THE SPATIAL OPTIMIZED DESIGN AND THE COMPARISON OF ECOLOGICAL AND ECONOMIC BENEFIT——A CASE STUDY OF KAI COUNTY,CHONGQING
以重庆开县为例，通过空间优化土地利用类型，使森林覆盖率从22.55%升至66.29%，经济林产值增长超11倍，实现生态与经济双赢。
Take Kai county as example which locate at the Three Gorges Projects area,according to the principle of optimized design,this paper make a spatial optimization to the land using type.The result indicate that the fragmented degree of the landscape tends to be decreasing;the change of landscape proportion is great;the advance fractal dimensions of patches substitute by economic forest land;the forest land renew as elements of landscape;the diversity and uniformity of landscape also decrease along the aggrandizement of the dominance degree, and increase greatly at different stages: from irrationality to rationality.This change may brought tremendous benefits to the economy of zoology: ①the forest land renew as elements of Kai county landscape,the cover ratio of forest increase obviously to 66.29% from 22.55% now,gain double.At the same time,the scale and intension of the soil erosion will control efficiently with the disappearances of the steep slope which use for furrowing;and it don't exist converse succession,it also make the whole landscape ecosystem system enter into virtuous circle.②Due to the optimization of land using pattern,it will ensure sustainable land use and economic development as well as greatly improve the productive potential of the ecology system to increase its economic effectiveness.Especially when economic forest land turn into the super fractal patches,its total output and production value will increase more than 11.2 times,thus the whole production value of the Kai county may break through to 18×10~8 yuan(RMB) and the unit area production value of agriculture also have 1.96 times as much as 1992.